int rtc_valid_tm(struct rtc_time *tm)
{
if (tm->tm_year < 70
- || tm->tm_mon >= 12
+ || ((unsigned)tm->tm_mon) >= 12
|| tm->tm_mday < 1
|| tm->tm_mday > rtc_month_days(tm->tm_mon, tm->tm_year + 1900)
- || tm->tm_hour >= 24
- || tm->tm_min >= 60
- || tm->tm_sec >= 60)
+ || ((unsigned)tm->tm_hour) >= 24
+ || ((unsigned)tm->tm_min) >= 60
+ || ((unsigned)tm->tm_sec) >= 60)
return -EINVAL;
return 0;